Bee and Pimon's (her father) place was great, and you really get a slice of everyday Thai life staying there. The apartment is cozy and immaculate, and only about a 10 minute walk to the ferry or BTS, and busses are right down the street.
Pimon is so helpful as well- from picking us up at the airport to writing a note in Thai saying "I'm a vegetarian, no meat please" for the street vendors to hailing us a cab when we left, such a great host. Bee is also very communicative, helping you out with everything you need before, during and after your stay remotely (she's in Canada). Highly recommended!